After update Kleo can not open option.

Please follow these steps to enable wp debug, to can see what errors appears in error log

•  Connect to your server by FTP
• Look in root directory of your WordPress install and open wp-config.php
• Search for define( ‘WP_DEBUG’, false ); and change FALSE value to TRUE

define( 'WP_DEBUG', true );

•   After this line add this:

define( 'WP_DEBUG_LOG', true );

WP_DEBUG_LOG is a companion to WP_DEBUG that causes all errors to also be saved to a debug.log log file inside the /wp-content/ directory. This is useful if you want to review all notices later or need to view notices generated off-screen (e.g. during an AJAX request or wp-cron run).

Repeat the described actions and then check the debug.log file and let me know what error appears.

Cheers